Low-Moisture Inkjet Ink Set for Boil-Resistant Lamination
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Solution Overview
Problem
Existing ink jet technologies for impermeable base materials fail to maintain sufficient lamination strength when subjected to boiling treatments, as adhesiveness between layers is compromised due to inadequate moisture content and resin composition in pretreatment liquids and inks.
Innovation Solution
An ink jet ink set for impermeable base materials comprising a pretreatment liquid and ink with specific equilibrium moisture content and resin composition, including acrylic or urethane resins, to enhance adhesiveness and maintain lamination strength during boiling treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional pretreatment liquid and ink are used for image recording on impermeable base material, then image recording is achieved, but lamination strength deteriorates when subjected to boiling treatment
Solution Approach 1:
The patent applies parameter changes by precisely controlling the equilibrium moisture content of solid content in both the pretreatment liquid (3.0% by mass or less) and the ink (3.0% by mass or less) at 25°C and 50% RH. This parameter control prevents excessive moisture retention that would compromise adhesiveness during boiling treatment, thereby maintaining lamination strength under thermal stress
Solution Approach 2:
The patent employs composite materials by combining specific resin types (acrylic resin or urethane resin) with controlled moisture content characteristics. The pretreatment liquid contains resin and water in a specific composition, and the ink contains pigment, resin, and water with controlled equilibrium moisture content. This composite formulation ensures both image recording quality and sustained lamination strength during boiling treatment
2Strength
If resin composition in pretreatment liquid and ink is not optimized, then formulation simplicity is maintained, but adhesiveness between layers is compromised
Solution Approach 1:
The patent specifies parameter changes by defining the equilibrium moisture content of solid content in the pretreatment liquid as 3.0% by mass or less and in the ink as 3.0% by mass or less at 25°C and 50% RH. These quantitative parameter specifications provide clear formulation guidelines that balance adhesiveness enhancement with formulation manageability
Solution Approach 2:
The patent applies local quality by selecting specific resin types (acrylic resin or urethane resin) with particular properties suited for the pretreatment liquid and ink formulations. This targeted resin selection optimizes local adhesive properties at the interface between the base material, image recorded material, and lamination layer without requiring complex overall formulation changes
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ink set ensures excellent lamination strength between the base material and image recorded material even after boiling treatments, by improving adhesiveness through controlled moisture content and resin properties, thereby stabilizing the laminate structure.
Implementation Method 1
an equilibrium moisture content of a solid content in the pretreatment liquid at 25° C. and 50% RH is 3.0% by mass or less, and an equilibrium moisture content of a solid content in the ink at 25° C. and 50% RH is 3.0% by mass or less
Data Source
AI summary
Provided are an ink jet ink set for an impermeable base material, including a pretreatment liquid containing a resin and water, and an ink containing a pigment, a resin, and water, in which an equilibrium moisture content of a solid content in the pretreatment liquid at 25° C. and 50% RH is 3.0% by mass or less, and an equilibrium moisture content of a solid content in the ink at 25° C. and 50% RH is 3.0% by mass or less, and applications thereof.